JPH0525307Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a fuel tank mounting device for a rear engine vehicle in which the engine is mounted at the rear of the vehicle body.

(Prior art) Conventional fuel tank mounting devices include, for example,
The one described in Japanese Utility Model Application Publication No. 61-154122 is known.

This conventional device has a structure in which a fuel tank is provided at the rear of the passenger compartment, and the rear of the fuel tank is simply partitioned off by the rear wall of the vehicle body.

(Problems to be solved by the invention) However, with the above-mentioned conventional device, there is a problem in that when a rear collision occurs, an obstacle directly hits the fuel tank, and the impact force spreads to the fuel tank, resulting in a lack of safety. It was hot.

(Means for Solving the Problems) The present invention was made to solve the above-mentioned conventional problems, and for this purpose, in the present invention, a rear wall is provided to partition the rear side of the passenger compartment. , an engine is mounted behind the rear wall, a transmission is coupled to the front side of the engine, a floor plate that constitutes the vehicle body is formed below the passenger compartment, and the transmission from the engine runs under the floor plate in the longitudinal direction. A fuel tank is attached to the rear surface of the rear wall at the left and right positions of the transmission device, and the height of the fuel tank is longer than the front, rear, left and right dimensions, and there is no space between the fuel tank and the engine in the front and back direction. In addition to providing a gap, a vehicle body strength member is provided at the front of the vehicle body to maintain a longitudinal gap between the front end of the transmission device and the gap between the vehicle body strength member and the front end of the transmission device. The fuel tank mounting device is configured to be smaller than the gap between the fuel tank and the engine.

(Function) With the fuel tank mounting device of the present invention, in the event of a rear collision, the impact force is absorbed by the engine, and furthermore, regarding the forward movement of the engine, the gap between the transmission device and the vehicle body strength member is Since the gap between the engine and the fuel tank is smaller than that between the engine and the fuel tank, the tip of the transmission is received by hitting the vehicle body strength member. In this state, there is a gap between the engine and the fuel tank, so no impact force is applied to the fuel tank. You can prevent it from spreading.

In addition, since the height of the fuel tank is larger than the front, rear, left, and right dimensions, the installation space on the plane becomes smaller, allowing the overall length and width of the vehicle to be shortened, and the depth of the fuel tank increases, reducing the amount of fuel. It becomes easier to measure changes in

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the fuel tank mounting device A of this embodiment includes a passenger compartment 1, an engine 2,
The main components include a front wheel transmission device 3, a front wall 4 as a vehicle body strength member constituting a trunk floor plate, and left and right fuel tanks 5, 5, and power is transmitted from an engine 2 to front wheels 6, 6 and rear wheels 7, 7. It is applied to a four-wheel drive rear engine vehicle B configured to transmit power.

The passenger compartment 1 is formed near the center of the vehicle body,
The rear side is partitioned by a rear wall 11, and the lower side is formed by a floor plate 12 constituting the vehicle body, and a tunnel 13 protruding upward is formed in the left-right center of the floor plate 12 in the front-rear direction.

The engine 2 is mounted at the rear of the vehicle body behind the rear wall 11, and in this case is mounted via an engine mount 25 so as to be located between the left and right side members 14, 14.

The front wheel transmission 3 transmits the power of the engine 2 to the front axles 61, 61, and includes a clutch and transmission 31 integrally connected to the front end of the engine 2, and a center differential ( A torque tube 34 extends forward in the tunnel 13 and is connected to a front differential (differential) 33 via a differential (differential) 32, and the power of the engine 2 is transmitted from the transmission 31 to the center differential. A power transmission system is formed in which the torque is transmitted to the front differential 33 via the torque tube 34 via the torque tube 32, and to the front wheels 6, 6 via the front axles 61, 61.

The front differential 33 is connected to the front side members 15 and 15 via the front differential mount 26.
The front wheels 6 and 15 are elastically supported by a front member 27 that is horizontally suspended between the front wheels 6 and 15.
6 moves up and down.

Further, the clutch and transmission 31, center differential 32, torque tube 34, front differential 33, which constitute the transmission device 3, and the transmission device 3
The engine 2 connected to the engine mount 25 and the front differential mount 26 are integrally connected to the cross member 27 or the side member 14,
It is elastically supported by 14.

The power transmission system to the rear wheels 7, 7 is transmitted to the rear differential 2 via a propeller shaft 71 extending rearward from the transmission 31, and is transmitted to the rear axle 7.
3, 73 to the rear wheels 7, 7.

A trunk room floor plate 20 is formed below the front hood 18 of the vehicle body, and on the left and right sides of the floor plate 20 are wheel house panels 2 that surround the front wheels 6, 6.
1 and 21 are formed, and the wheel house panel 2
A front wall 4 constituting a vehicle body strength member extends in the left-right direction and is erected between 1 and 21.

The front wall 4 includes a rain force member 22 welded to the front wall 4 and extending in the left-right direction, and a rain member 22 extending horizontally between the front side members 15, 15 extending forward from the side members 14, 14. The front wall 4 is reinforced with a force member 23 and the like, and a gap S1 in the front-rear direction is maintained between the front wall 4 and a front differential 33 that is the tip of the front wheel transmission device 3.

The left and right fuel tanks 5, 5 are formed to have approximately the same shape, and have a height larger than the front, rear, left, and right dimensions, and a fuel circulation tube 51 and a circulation pump (not shown) are provided between the fuel tanks 5, 5. A vertical gauge (not shown, e.g.: Utility Model No. 58-26625) has been established. Note that 52 is a fuel injection port.

Further, the fuel tanks 5, 5 are attached to the rear surface of the rear wall 11 with a gap S2 between them and the engine 2 in the longitudinal direction wider than the gap S1 at the left and right positions of the transmission 31. .

The mounting structure is such that a cushioning material 81 is attached to the rear surface of the rear wall 11.
are attached, and the upper and lower support bands 82, 8
3 is attached and the front of the fuel tank 5 is in close contact with the cushioning material 81, the upper support band 82
By running the lower support band 83 from the side of the fuel tank 5 to the rear, and by running the lower support band 83 from the side of the fuel tank 5 to the bottom, it supports the weight of the fuel tank 5 while fixing movement in the vertical, horizontal, and front-rear directions. The structure is such that

The rear side of the fuel tank 5 is covered by heat shield plates 91, 92, and 93 divided into upper, middle, and lower parts, and the upper heat shield plate 91 covers the portion from the upper surface of the fuel tank 5 to the upper side rear surface. The middle heat shield plate 92 covers the area from the middle of the side rear surface to the lower part of the side rear surface, the lower heat shield plate 91 covers the bottom surface, and each heat shield plate 91, 92, 93 covers the flange part. Weld bolts 84 and 8 are connected to each other by screws 94, and the upper ends thereof are screwed to the rear wall 11 and fixed to the support bands 82 and 83.
4 and is attached to cover the rear side of the fuel tank 5.

Note that 16 in the figure is a front bumper, 17 is a rear bumper, and 19 is an instrument panel.

Next, the operation of this embodiment will be explained.

In the fuel tank mounting device A of this embodiment, the rear impact force is first received by the engine 2,
Furthermore, forward movement of the engine 2 is suppressed by the engine mount 25, front differential mount 26, etc. under normal impact force. However, if the vehicle body receives a large impact force that causes major damage, for example, rendering it unusable, the gap S1
Since this is smaller than the gap S2 (S1<S2), the front differential 33 is received by hitting the front wall 4, which is a vehicle body strength member. At this time, there is a space between the engine 2 and the fuel tank 5 (S2
-S1), the impact force does not spread to the fuel tank 5. This prevents fuel from leaking from the fuel tank 3.

The front wall 4 is a member constituting the vehicle body,
It is easy to increase the rigidity in the front and rear directions as needed.

Furthermore, since the fuel tanks 5, 5 are disposed between the front and rear axles 61, 73, and are also disposed on the left and right positions with the transmission 31 in between,
The weight balance of the vehicle is stabilized, and the fuel tank 5
Since the height dimension is larger than the front, rear, left and right dimensions, the planar installation space becomes smaller and the depth becomes deeper.

Moreover, the rear side of the fuel tank 5 has heat shield plates 91, 92,
93, it is shielded from the heat radiation of the engine 2 and is not heated.

In addition, since the front and rear bumpers 16 and 17, the vehicle body strength member 4, the front differential 31, the torque tube 34, the transmission 31, and the engine 2 are arranged in a straight line in the longitudinal direction of the vehicle body, front and rear collisions of the vehicle are avoided. The vehicle body rigidity is improved against buckling at times, and the safety of the passenger compartment 1 can be ensured.

As described above, in the present invention, an embodiment in which a gap S1 is provided between the front wall 4 and the front differential 33 has been described with reference to the drawings, but an auxiliary device for suppressing the longitudinal movement of the engine is added to other parts, and the engine is The fuel tank may be prevented from being damaged in the event of a collision.

Further, although the embodiment shows a fuel tank mounting device applied to a four-wheel drive rear engine vehicle, it can also be applied to a front wheel drive rear engine vehicle.

(Effects of the invention) As explained above, with the fuel tank mounting device of the invention, the impact force at the time of a rear collision is received before it spreads to the fuel tank, so there is a risk of damage to the fuel tank. It is possible to prevent this and ensure safety.

Also, since the fuel tank is vertically long,
The flat installation space is smaller, making it possible to shorten the overall length and width of the vehicle, reducing vehicle weight and improving driving performance.The depth of the fuel tank increases, making it easier to measure the amount of fuel. This makes it easier to measure fuel levels down to a small amount remaining, and since the fuel tank is located on the left and right between the front and rear axles, the weight balance of the vehicle is good and driving stability is improved. .

[Brief explanation of the drawing]

Fig. 1 is a side view showing a fuel tank mounting device according to an embodiment of the present invention, Fig. 2 is a plan view of the fuel tank mounting device, and Fig. 3 is a perspective view of the fuel tank covered with a heat shield plate. . A...Fuel tank mounting device, 1...Crew compartment, 2
...Engine, 3...Front wheel transmission (transmission device),
4...Vehicle body strength member, 5...Fuel tank, 11...
...Rear wall, 12...Floor plate, 61...Front axle, S1...
...gap, S2...gap.

Claims (1)

[Scope of utility model registration request] A rear wall is provided to partition the rear side of the passenger compartment, an engine is mounted behind the rear wall, a transmission is connected to the front side of the engine, a floor plate forming the vehicle body is formed under the passenger compartment, and the engine is mounted on the rear wall. A transmission device extends under the floorboard in the front-rear direction, and a fuel tank is attached to the rear surface of the rear wall at the left and right positions of the transmission device, and the fuel tank is formed with a height longer than a front-rear, left-right dimension. , and a longitudinal gap is provided between the fuel tank and the engine, and a vehicle body strength member is provided at the front of the vehicle body to maintain a longitudinal gap between the front end of the transmission device and the vehicle body strength. A fuel tank mounting device for a rear engine vehicle, characterized in that a gap between the member and the tip of the transmission device is smaller than a gap between the fuel tank and the engine.